The Parks Department called in its big guns Thursday to try and remove a Banksy work overlooking the Brooklyn Heights promenade, bringing a high-powered pressure washer after a worker was unable to erase an image of the Twin Towers using a gas-powered drill with an abrasive disc.

The worker ground away at the black, stenciled image — which was painted in line with the new World Trade Center building — for 15 minutes before giving up on the tool, which passerby Mary Zappulla, 33, of Cobble Hill called an “art destroyer.”

“Why are they taking it away? It’s so perfect. It’s a beautiful tribute,” she said.

“We are lucky to have Banksy in Brooklyn.”

Banksy never posted a picture of the promenade graffiti, but a near-identical image — with an added orange chrysanthemum — was unveiled in TriBeCa on Tuesday.

Earlier today, Banksy posted the Post’s “Get Banksy!” front page to his website, saying, “I don’t read what I believe in the papers.”

Exclusive Photos by Paul Martinka: A time lapse showing the city’s removal of Banksy artwork.

If you take Banksy down, I expect to see the entire city completely clean of all the fear inducing, gang riddled, garbage, out of control graffiti that we have to live with and look at every single day in NYC. Shameful Mayor Bloomberg. Shameful.